package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;


    @Override
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        //向菜品插入1条
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.insert(dish);
        //获取id
        Long dishId = dish.getId();

        //向口味插入n条
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishId));
            dishFlavorMapper.insertBatch(flavors);
        }


    }

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(), dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //1.查询起售中的菜品，如果存在起售中的菜品，则不能删除
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == 1) {
                //当前菜品属于起售中
                throw new DeletionNotAllowedException("当前菜品正在起售中，不能删除");
            }
        }

        //判断菜品是否被套餐关联了
        List<Long> setmealIdsByDishIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIdsByDishIds != null && setmealIdsByDishIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

//        //删除菜品数据
//        //删除口味数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            dishFlavorMapper.deleteByDishId(id);
//    }
        dishMapper.deleteByIds(ids);
        dishFlavorMapper.deleteByDishIds(ids);

    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);
        //根据id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    @Transactional
    public void updateWithFlavor(DishDTO dishDTO) {
        //修改菜品数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        //删除菜品口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //添加新的菜品口味数据
        Long dishId = dishDTO.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishId));
            dishFlavorMapper.insertBatch(flavors);
        }
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        dishMapper.startOrStop(status,id);
    }
}
